Cisco's Duo is the product that secures the perimeterless, work-from-anywhere world with Zero Trust. Duo provides user-centric zero-trust security by verifying the identity of users and the health of their devices before they connect to the apps they need. It's designed to protect access to sensitive data for all users, devices, and applications, aligning with the zero trust concept of "least privilege" and continuous trust assessment12.
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https://www.cisco.com/c/en/us/products/security/duo/index.html